Patent GB-190703010-A (GB)
Title: Improvements in Change-box Motions for Looms for Weaving.
Inventor: WAECHTLER FRANZ LOUIS
Filed: 1907-02-06
Granted: 1907-07-11
Abstract: 3010. Wõchtler, F. L. Feb. 6. Loom change-box motions.- The positions of the drop-boxes are adjusted by means of Knowles change-box mechanism, which is controlled manually by means of numbered d disks, handles, &c., in accordance with the indications of a pattern strip. The levers carrying the movable gear-wheels of the Kuowles mechanism are controlled by means of rods, levers, and wires actuated by levers on shafts 36, on which are secured two-armed levers 44 connected by springs 53 and wires 52 to pivoted levers 48. These levers are held normally against a stop 59 by the springs, and to them are pivoted hooks 54 adapted to be engaged by a knife 35, which is reciprocated in suitable slots by rods and levers on a shaft 24, rocked by an eccentric on the crankshaft of the loom. The hooks 54 rest on the ends of the arms 61 of pivoted three-armed levers, of which the arms 60 are connected by rods to cranks on the shafts of the disks 1, 2, 3. 4. Springs 71 normally hold the arms 60 against a stop 72, so that the arms 61 hold up the hooks 54 out of engagement with the knife 35. By turning one of the disks, the corresponding three-armed lever is moved into the position shown in full lines, and its arm 62 is engaged by a web on a tumbler-lever 65 ; the corresponding hook 54 is moved to the right by the knife, thereby moving the proper shuttle box into the active position. When another disk is turned, the arm 62 of the corresponding three-armed lever raises the lever 65 and frees the previously engaged arm 62, which is returned to its normal position by the action of the spring 71. The invention is described as applied to a loom with drop-boxes having three compartments at each side of the loom. Four shuttles are employed, and these are normally in the top and bottom compartments at each side. When a compartment containing a shuttle is brought to the level of the shuttle race, the empty middle compartment on the opposite side of the loom is always on the same level, and two successive picks of the same shuttle are made. To prevent a change from being made except after an even number of picks, an extension 83 of the tumbler-lever 65 is adapted to be engaged by a projection 82 on a pivoted lever 78, which is moved outwards after each second pick by the action on a roller at its end of one of three pins on an hexagonal barral 93. The barrel is carried by a pivoted frame 88, which is oscillated by a rod and a lever on the shaft 24, and the barrel is turned one-sixth of a revolution at each oscillation by means of a hook 94. If it is desired to make single picks with any shuttle, three shuttles only are employed, and the drop-boxes at opposite sides of the loom are moved in unison. The projection 82 is removed, or the lever 78 is held in its outer position. The pattern strip is marked with the colours of the weft in the successive shuttles to be employed, or the shuttles may be indicated by numbers, Fig. 7, and the number of picks of the successive shuttles may also be indicated. The strip passes from a roll over suitable rollers, through a channel on the breast beam, and over the cloth beam, against which it is pressed by suitable rollers, so that it is drawn forward at the same rate as the woven fabric. The strip is then guided to and wound on a roll, which is rotated by a weighted cord. The weaver sets the disks in accordance with the indications on the strip at the entrance to the channel.